代码调用外部HTTP请求接口

浅浅的花香味﹌ 2022-03-09 17:13 355阅读 0赞

转载链接样例：[https://www.cnblogs.com/guxiong/p/6661272.html][https_www.cnblogs.com_guxiong_p_6661272.html]  
[https://zhidao.baidu.com/question/627561819246516844.html][https_zhidao.baidu.com_question_627561819246516844.html]

package net.ninehkj.logistics.util;
    
    import java.io.IOException;
    import java.io.UnsupportedEncodingException;
    import java.util.LinkedList;
    import java.util.List;
    import java.util.Map;
    import javax.annotation.Resource;
    import org.apache.http.NameValuePair;
    import org.apache.http.client.ResponseHandler;
    import org.apache.http.client.entity.UrlEncodedFormEntity;
    import org.apache.http.client.methods.CloseableHttpResponse;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.entity.StringEntity;
    import org.apache.http.impl.client.BasicResponseHandler;
    import org.apache.http.impl.client.CloseableHttpClient;
    import org.apache.http.impl.client.HttpClients;
    import org.apache.http.message.BasicNameValuePair;
    import org.apache.http.util.EntityUtils;
    
    /**
     * 	调用HTTP接口返回数据
     * @author Administrator
     *
     */
    public class InterfaceUtils {
    
    	@Resource
    	private CloseableHttpClient  httpClient;
    	/**
    	 * Post请求(此方法会返回字符串)
    	 * @param payUrl	路径
    	 * @param param		请求数据
    	 * @return
    	 * @throws UnsupportedEncodingException 
    	 * 	将map集合转换为json字符串
    	 * JSONObject jsonObject = JSONObject.fromObject(map);
    	 */
    	public static String JSONPostHttpCallOtherInterfaceUtils(String payUrl, String json) throws UnsupportedEncodingException {
        	
    		/**
        	 * 	创建Httpclient对象
        	 */
    		CloseableHttpClient  httpClient = HttpClients.createDefault();
    		ResponseHandler<String> responseHandler = new BasicResponseHandler();
    		String result = "";
    		try {
    			/**
    			 * 	创建HTTP请求并放入请求地址
    			 */
    			HttpPost httpPost = new HttpPost(payUrl);
    			if(!"".equals(json)) {
    				/**
    				 * 	将数据放入UrlEncodedFormEntity会自动将数据编码为合适内容
    				 */
    				StringEntity requestEntity = new StringEntity(json, "utf-8");
    				requestEntity.setContentEncoding("UTF-8");
    				/**
    				 * 给httpPost设置JSON格式的参数
    				 */
    				httpPost.setHeader("Content-type", "application/json");
    				httpPost.setEntity(requestEntity);
    				/**
    				 * 发送HTTP请求获取返回值
    				 */
    				result = httpClient.execute(httpPost, responseHandler);
    			}
    		} catch (Exception e) {
    			e.printStackTrace();
    		} finally {
    				try {
    					httpClient.close();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    		}
    		return result;
    	}
    	
    	
    	
    	
    	/**
    	 * Post请求
    	 * @param payUrl	路径
    	 * @param param		请求数据
    	 * @return
    	 * @throws UnsupportedEncodingException 
    	 */
    	public static String PostHttpCallOtherInterfaceUtils(String payUrl, Map<String, String> param) throws UnsupportedEncodingException {
        	
    		/**
        	 * 	创建Httpclient对象
        	 */
    		CloseableHttpClient  httpClient = HttpClients.createDefault();
    		CloseableHttpResponse response = null;
    		String result = "";
    		try {
    			/**
    			 * 	创建HTTP请求并放入请求地址
    			 */
    			HttpPost httpPost = new HttpPost(payUrl);
    			if(null != param) {
    				/**
    				 * 	此集合用于存储传送的数据
    				 */
    				List<NameValuePair> list = new LinkedList<NameValuePair>();
    				for (String key : param.keySet()) {
    					/**
    					 * 	遍历map中的参数放入集合中
    					 * 	BasicNameValuePair对象中传入参数该map的key和当前key对应的value值
    					 * 	为什么使用BasicNameValuePair，因为我们在下面使用UrlEncodedFormEntity
    					 * 	对BasicNameValuePair数据进行编码时只能接受List<? extends NameValuePair>
    					 * 	为参数。链接：https://blog.csdn.net/zdb292034/article/details/80663792
    					 * 	
    					 */
    					list.add(new BasicNameValuePair(key, param.get(key)));
    				}
    				/**
    				 * 	将数据放入UrlEncodedFormEntity会自动将数据编码为合适内容：param1=value1¶m2=value2
    				 * 	如果内容不规范，可以使用StringEntity
    				 */
    				UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(list);
    				httpPost.setEntity(urlEncodedFormEntity);
    				/**
    				 * 	进行HTTP请求
    				 */
    				response = httpClient.execute(httpPost);
    //				httpClient
    				/**
    				 * 	执行http请求
    				 */
    				result = EntityUtils.toString(response.getEntity(), "utf-8");
    			}
    		} catch (Exception e) {
    			e.printStackTrace();
    		} finally {
    			if(null != response) {
    				try {
    					response.close();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    			}
    		}
    		return result;
    	}
    }

[https_www.cnblogs.com_guxiong_p_6661272.html]: https://www.cnblogs.com/guxiong/p/6661272.html
[https_zhidao.baidu.com_question_627561819246516844.html]: https://zhidao.baidu.com/question/627561819246516844.html